Clinical nutrition

Nutritional Risk Index calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Serum albumin

g/dL

Allowed range: 0.5–6 g/dL

Grams per litre. A value entered in g/dL is multiplied by 10.

Present weight

Allowed range: 44.09–551.16 lb

Usual weight is the stable weight over the prior 6 months. The ratio is not limited when present weight is higher.

Usual weight

Allowed range: 44.09–551.16 lb

Usual weight is the stable weight over the prior 6 months. The ratio is not limited when present weight is higher.

Result

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Primary source

Prasad N et al. Validity of nutrition risk index as a malnutrition screening tool compared with subjective global assessment in end-stage renal disease patients on peritoneal dialysis. Indian J Nephrol. DOI: 10.4103/0971-4065.158449. PMID: 26937075. PMC4753738 prints NRI = 1.519 × serum albumin in g/L + 41.7 × (present weight / usual weight). Above 100 is no risk, 97.5 to 100 is mild, 83.5 to 97.5 is moderate, and below 83.5 is severe. The shared endpoint 97.5 stays in the moderate interval. The group follows the unrounded index. Usual weight in that text is stable weight over the prior 6 months. The ratio is not capped when present weight exceeds usual weight. (2016)

Scope: Hospitalized patients in whom serum albumin and a present-to-usual weight ratio can be measured. The index was built for perioperative nutrition risk.

Last reviewed 2026-10-17

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Professional use only

For qualified clinicians. Independently verify inputs, calculations, source guidance, and applicability before any clinical action. This calculator does not replace clinical judgment.

Source: Prasad N et al. Validity of nutrition risk index as a malnutrition screening tool compared with subjective global assessment in end-stage renal disease patients on peritoneal dialysis. Indian J Nephrol. DOI: 10.4103/0971-4065.158449. PMID: 26937075. PMC4753738 prints NRI = 1.519 × serum albumin in g/L + 41.7 × (present weight / usual weight). Above 100 is no risk, 97.5 to 100 is mild, 83.5 to 97.5 is moderate, and below 83.5 is severe. The shared endpoint 97.5 stays in the moderate interval. The group follows the unrounded index. Usual weight in that text is stable weight over the prior 6 months. The ratio is not capped when present weight exceeds usual weight. (2016)

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Clinical inputs

Serum albumin (g/L)Accepted range: 5 to 60
Present weight (kg)Accepted range: 20 to 250
Usual weight (kg)Accepted range: 20 to 250

Primary source

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